[j-nsp] juniper router reccomendations

[Adam Vitkovsky]

> Saku Ytti [mailto:saku at ytti.fi]
> Monday, August 01, 2016 11:04 AM
>
> On 1 August 2016 at 11:02, Adam Vitkovsky
> <Adam.Vitkovsky at gamma.co.uk> wrote:
>
> > So essentially you're suggesting holding up BGP updates to peers until
> > the router has it's FIB fully populated right?
>
> Yes.
>
> > I think that might be easier said than done, there would have to be a
> > correlation between Protocol to RIB update job ID and RIB to FIB
> > update job ID, so that each FIB update job is traceable back to the
> > protocol which initiated it. Now what would constitute the job, single pfx a
> bulk of pfxes?
>
> I don't see why it would be fundamentally impossible. Just don't send ACK
> until you've converged. Maybe in practice it's too expensive, maybe you can
> make it cheap enough by throwing DRAM and cores at it.
> I'm thinking something like BEAM cost processes for each BGP TCP packet.
>
Not sure what you mean by BEAM cost process?


> > Anyways, till the triggered approach is implemented I think you can
> > slow down iBGP update generation with the "out-delay" knob.
> > It's not as clear of a cut as with csco's "neighbor advertisement-interval"
> > but looks like it can do the same thing.
> >
> https://kb.juniper.net/InfoCenter/index?page=content&id=KB26446&actp=
> s
> > earch
>
> Relying on timers seems like huge, hard to manage complexity.
>
The biggest drawback I see is, that it would uniformly slow down the BGP convergence (doesn't matter if there's one or 500K prefixes) it would always wait for the "out-delay" period.

adam


        Adam Vitkovsky
        IP Engineer

T:      0333 006 5936
E:      Adam.Vitkovsky at gamma.co.uk
W:      www.gamma.co.uk

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